Thread-guide for spinning and twisting machines.



' J. E. PRBST. v THREAD GUIDE FOR SPINNING. A ND TWISTINGr MACHINES.

APPLIOATION FILED MAY 27.1908.

Patented Jaq 1 9, 1909.

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rnrrrnn srnrns FATENT JOHN E. PREST, OF MELROSE, MASSACHUSETTS.

TFREAD-GUIDE FOR SPINNING- AND TWISTING MACHINES.

T 0 all whom it may concern:

Be it known that 1, JOHN E. Pnns'r, a citizen of the United States, and resident of Melrose, county of Middlesex, State of Massachiu setts, have invented an Improvement in Thread-Guides for Spinning and Twisting Machines, of which the following description, in connection with the accompanying drawing, is a specification, like letters on the drawclamped in its adjusted position.

The construction herein illustrated is one which is especially adapted for a metal finger board, although the finger board or parts thereof may be made of wood without departing from the invention.

In the practical use of spinning machines more or less difficulty is experienced in maintaining the eye of the thread guide properly alined with the spindle. These guides are usually made of wire and project beyond the finger board and are in a position where they are likely to be inadvertently struck by either the operator or some object, and thus thrown out of proper alinement. The clamping devices now commonly used for securing the shank of the guide to the finger board do not hold the guide sutficiently tight to prevent its being moved when it is accidentally hit as above described.

One of the objects of my invention is to provide a simple locking device which will effectually hold the guide and prevent its being displaced while yet permitting its easy adjustment either longitudinally or laterally whenever necessary.

Figure 1 is a side elevation of a finger board and connected thread guide embodying one form of my invention, the thread board to which the finger board is pivotally connected being shown in section; Fig. 2 is a front elevation of the parts shown in Fig. 1 but with the finger board swung up and the clamping plate removed; Fig. 3 is a section on the line 33, Fig. 2;

Specification of Letters Patent.

Application filed May 2"], 1998.

Patented Jan. 19, 1909.

Serial No. 435,275.

Fig. 4 is a perspective view of the clamping plate, detached; Figs. 5 and 6 are views of two forms of thread guide, to be referred to.

In the drawings 2 designates the usual thread board to which the finger boards are pivoted in usual manner, each having connected with it a thread or yarn guide, and in practice there is usually one such finger board and thread guide for each spindle of the spinning or twisting frame.

The finger board 3, preferably made of metal, is provided with suitable trunnions d, Fig. 2, which are pivotally mounted in bearings 5 attached to the thread board, the finger board having a downtuined flange 6 along its sides and outer end, a depending ear 7 at the back forming a stop to engage the thread board and maintain the finger-board in operative position, Fig. 1.

The thread guide is made of stout wire and has the eye 8 of usual construction, the shank 9 being shown in Figs. 2 and 5 as bent upon itself into substantial U-shape at its inner end, and is held in pl ce upon the fingerboard by means of a clamping plate 10 shaped to fit within the flange of the finger board and having an aperture 11. A clamping bolt 12 is passed through the opening 13 in the finger board and through the aperture 11, and a nut 14 is applied to the bolt outside the plate 10, to clamp the bent shank between the finger board and the plate, in a manner similar to that shown in my patent No. 868005 dated October 15, 1907. The shank of the thread guide passes through an opening in the flange 6 at the front of the finger board, and in order to positively lock the thread guide in adu ted angular position I have provided the inner face of tlie finger board with an elongated locking rib 15, Figs. 2 and 3, at right angles to the front edge of the board and which enters one of several grooves or notches 16 made in the laterally bent part of the shank. These grooves by cooperation with the rib positively hold the shank of the guide in any laterally adjusted or angular position with relation to the rib, as will be manifest, the length of the rib enabling the guide to be moved in or out as de sired without changing the angularity or interfering with the locking action, the ad justed position being maintained when the clamping nut 14 is set up to exert pressure upon the plate 10, and such pressure need only be sufiicient to maintain the rib in a groove and hold the guide from longitudinal displacement. I prefer to also corrugate or notch the upper and lower faces of the shank, as at 17, to increase the gripping action of the adjacent faces of the finger board and clamping plate upon the shank, such increased action serving to hold the thread guide substantially immovably in position.

By making the shank U-shaped, as shown in Figs 2 and 5, the bolt 12 passes between the two parts of the shank and the pressure exerted by the clamping plate is more evenly distributed over the shank, preventing any tendency to bend or twist, but I may make the shank substantially L-shaped, as in Fig. 6, if the clamping plate is heavy enough. In such case the lateral bend 18 is provided with transverse grooves or notches 19 to cooperate with the locking rib 15, as before, and corrugations 20 are formed on the strai ht portion of the shank to engage the inner faces of the finger board and clamping plate, as before.

The grooves, notches or corrugations in the shank of the thread guide may be formed in any suitable manner, preferably by subjlecting the bent shank to the action of proper ies.

To adjust the thread guide the nut 14 is loosened sufliciently to permit the cooperating groove in the laterally bent part of the shank to be disengaged from the locking rib 15 and the shank is moved laterally, and in or out, if necessary and the rib is then brought into engagement with the-proper groove and the nut is set up, maintaining the adjustment.

As shown in Figs. 2 and 6 the grooves in the bent part of the shank are not parallel, but so positioned with relation to the shank that when the desired angular or lateral adjustment of: the thread guide is effected the locking rib 15 will seat firmly in the desired groove.

Having fully described my invention, What I claim as new and desire to secure by Letters Patent is 1. The combination with a finger board having a locking rib thereon, of a thread guide having its shank bent and provided with grooves any one of which is adapted to cooperate with said rib, to vary the angular position of the shank relatively to the rib, and means to retain said parts in locked position.

2. The combination with a metallic finger board having an elongated locking rib on its inner face, of a thread guide having its shank bent laterally and having a plurality of transverse grooves any one of which is adapted to cooperate with the rib and posi tively lock the shank from lateral movement relatively to the finger board, while maintaining the thread guide in desired angular position relatively to the front of the board, and means to retain the guide clamped on the finger board.

3. The combination with a finger board having a rib thereon in fixed relation to its front edge, of a thread guide clamped to the finger board and having its shank provided with a series of non-parallel grooves, any one of which is adapted to cooperate with the rib and thereby positively fix the thread guide in a predetermined angular position with relation to the front of the finger board;

4. The combination, with a thread guide having its shank laterally bent and provided with a plurality of transverse grooves, of a metallic finger board and a metal clamping plate, between wlnch the shank 1s interposed, a locking rib on one of said members to cooperate with a groove of the shank and lock the thread guide in adjusted angular position with relation to the rib, and means to fasten the said finger board and plate together and clamp the shank between them.

5. The combination with a thread guide having a bent, transversely grooved shank, of a finger board having on its inner face a rib to interlock with any one of the grooves and thereby fix the position of the thread guide laterally, a clamping plate to hold the shank and rib in engagement, and a fastening bolt to connect the plate and finger board.

6. The combination with a pivotally mounted metal finger board having a locking rib on its inner face at right angles to its pivot, of a threadguide having a laterally bent shank provided with a series of radial grooves arranged across the bend to cooperate with the rib, and positively hold the thread guide in a predetermined angular po sition relatively to the rib, and means to hold the shank in adjusted position upon the finger board.

7. The combination with a finger board and a clamping plate, of a thread guide having its shank bent laterally and provided with a plurality of grooves and interposed between the finger board and plate, means-to clamp the shank between said members, and a fixed rib on the finger board to enter a groovein the shank, and hold the-latter in a predetermined angular position relatively to the rib.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

JOHN E. PREST.

Witnesses:

JOHN G. EDWARD, THoMAsJ. DRUMMOND. 

